Before Caesar's last day something risky happens (7)

I believe the answer is:

betides

'happens' is the definition.
(betiding is a kind of happening)

'before caesar's last day something risky' is the wordplay.
'before' means one lot of letters go next to another.
'caesar's last day' becomes 'ides' (Julius Caesar was killed on the Ides of March).
'something risky' becomes 'bet' (a bet or gamble is risky).
'ides' after 'bet' is 'BETIDES'.

I've seen this clue in The Guardian.

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